The latest update to this website was at 838am Tuesday (HST)

 

Here are the highest temperatures Monday…and the lowest Tuesday morning:

86 – 72  Lihue AP, Kauai
86 – 72  Molokai AP, Molokai
88 – 74  Kahului AP, Maui
88 – 73  Kona AP, Big Island
85 – 71  Hilo, AP, Big Island

Here are the latest 24-hour precipitation totals (inches) for each of the islands as of Tuesday morning:

0.41  Mount Waialeale, Kauai
0.05  Kahuku TA, Oahu
0.00  Molokai
0.00  Lanai
0.01  West Wailuaiki, Maui
0.23  Waiaha Stream, Big Island

>>> There are lots of locations that measure rainfall and winds, here’s a map of all areas for your reference (the map is clickable to zoom in closer)

The following numbers represent the strongest wind gusts (mph) as of Tuesday morning:

14  Port Allen, Kauai
23  Oahu Forest NWR, Oahu
22  Makapulapai, Molokai
28  Lanai 1, Lanai
31  Kealaloloa Ridge, Maui
27  Kealakomo, Big Island

Hawaii’s Mountains – Here’s a link to the live webcams on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii, and atop the Haleakala Crater (~10,023 feet) on Maui. These webcams are available during the daylight hours here in the islands, and at night whenever there’s a big moon shining down. Also, at night you will be able to see the stars, and the sunrise and sunset too…depending upon weather conditions.

 

https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

Big Blue…click twice for largest version

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/tpw/13/GOES17-TPW-13-900x540.gif 

 Remnant circulation and moisture associated former Tropical Cyclone Gil is moving towards Hawaii…likely moving by just north of the state Wednesday into Thursday…Tropical Cyclone Henriette far east-southeast of Hawaii…is moving generally in our direction as well, and may move by northeast of the islands by Sunday into Monday. The end result in both cases will be unusually humid weather for us!

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/GEOCOLOR/GOES17-HI-GEOCOLOR-600x600.gif

Low clouds being carried our way on the trade winds 

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/13/GOES17-HI-13-600x600.gif

A few high level clouds in the vicinity

 

https://radar.weather.gov/ridge/standard/HAWAII_loop.gif

Localized showers…very few 

 

https://www.weather.gov/images/hfo/satellite/Kauai_VIS_loop.gif

Kauai and Oahu (Satellite)

 

https://radar.weather.gov/ridge/standard/PHKI_loop.gif

Kauai and Oahu (Radar)

 

https://www.weather.gov/images/hfo/satellite/Oahu-Maui_VIS_loop.gif

Oahu and Maui County (Satellite)

 

https://radar.weather.gov/ridge/standard/PHMO_loop.gif

Oahu and Maui County (Radar)

 

https://www.weather.gov/images/hfo/satellite/Hawaii_VIS_loop.gif

 Maui, Kahoolawe, Lanai, and the Big Island (Satellite)

 

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

Maui County and the Big Island (Radar)

 

https://radar.weather.gov/ridge/standard/PHWA_loop.gif

Big Island (Radar)

 

Model showing precipitation through 8-days (you can slow this animation down)


Please open this link to see details on any current Watches, Warnings and Advisories noted above

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Tuesday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s mostly clear to partly cloudy here in Maui County early this morning.  The low temperature at my place was 53 degrees.

Weather Wit of the day:  Becalmed – A sailing condition marked by a combination of lack of winds and the drinking of the last cold beer

>>> Highest Temperature Monday, August 4, 2025 – 114 Tolleson, AZ
>>> Lowest Temperature Tuesday, August 5, 2025 – 29 near Grand Lake, CO 

 

Hawaii’s Broad Brush Weather Overview:  The high pressure ridge north of the islands will weaken over the next several days, decreasing trade wind speeds, especially as the remnants of former Tropical Cyclone Gil drifts westward, passing just north of the Hawaiian Islands on Wednesday and Thursday. Warm and very humid conditions with an increase in island shower activity will accompany Gil’s passage. Tropical Cyclone Henriette will also drift westward, passing just north of the islands, producing similar lighter hybrid sea breeze and trade winds, along with very warm and humid conditions Sunday through next Monday.

Hawaii’s Weather Details: Satellite imagery shows just a few fairly stable bands of stratocumulus clouds upstream of the Hawaiian Islands. The upper level ridge remains anchored over the islands today, with subsidence (downward moving air) temperature inversion heights hovering around the 5,000 foot elevation level. Inversion heights at this low level will continue to cap vertical cloud development, and limit any shower activity across the state today and tonight.

A large rotating band of clouds to our east, associated with the remnants of former Tropical Cyclone Gil, will continue to drift westward over the next few days. This unstable and very humid air mass will pass just north of the Hawaiian Islands from Wednesday through Thursday, disrupting the trade wind flow and producing very warm and humid weather across the state. Clouds and shower will be enhanced a bit during this time period.

As the trade winds diminish the more typical windward mountain lifting pattern will switch into a more hybrid light trade wind sea breeze island heating driven pattern. In this hybrid sea breeze pattern island interior and typically drier leeward sections will see more afternoon cloud and shower development. High boundary layer moisture levels with surface dew point temperatures in the low 70s and temperature inversion heights ranging from 8,000 to 9,000 feet will aid in convective heating shower development from Wednesday through Thursday. Any of these developing slow moving showers could produce brief locally heavy shower activity in some leeward areas, particularly along the Kona slopes of the Big Island.

Drier conditions return briefly with moderate trade winds on Friday and Saturday. Long range global models and National Hurricane Center forecasts show another tropical system, currently Tropical Storm Henriette, passing just north of the islands from Sunday through Monday, once again disrupting trade winds and producing warm and very humid weather. Stay tuned for weather forecast updates as the track and intensity of Henriette will likely change over time.

Fire weather: Humidity levels will show increasing trends with gradually decreasing winds. The trade wind inversion heights will hover around the 4,500 to 5,500 foot elevation level with very low relative humidities continuing near the inversion level along the upper elevations of Haleakala on Maui and the mid to upper slopes of the Big Island. Elevated fire weather concerns will continue in these areas. Humidity levels will increase dramatically as a tide of tropical moisture sweeps into the islands later tonight through Thursday, as the remnants of former Tropical Cyclone Gil drifts westward and passes just north of the Hawaiian Islands. Another round of deep tropical moisture will sweep through the islands from Sunday into Monday as Henriette follows a similar path.

Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Vog map animation

https://www.weather.gov/images/hfo/graphics/npac.gif

 

Hawaii’s Marine Environment:  Trade winds will weaken in response to surface high pressure centered far north of the islands drifting further northeast through the week. The remnants of former Tropical Cyclone Gil are forecast to pass across the north offshore waters from tonight through Thursday. This will briefly disrupt mid week trades with its western passage. Trades will return and strengthen by Friday as the pressure gradient tightens back up north of the state.

The moderate size, long period south swell that peaked, boosted surf along many south-facing shores to High Surf Advisory (HSA) heights. South surf is expected to briefly fall below advisory levels later today. Another south swell arriving late Wednesday or early Thursday will pick south-facing surf back up to HSA levels.

A moderate, medium to long period east swell moving in from what was once Tropical Cyclone Gil, in tandem with short period trade wind wave chop, will peak east-facing shore surf to near advisory levels.

A small, medium period northwest swell originating from former Typhoon Krosa in the West Pacific is bumping up surf a bit along north-facing shores. A small size, medium to long period northwest swell is scheduled to arrive late Wednesday into Thursday, that will keep northern surf from going completely flat.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean: 

Tropical Cyclone Dexter…is located about 345 miles north of Bermuda

DEXTER A BIT WEAKER BUT FORECAST TO RE-INTENSIFY AS A POST-TROPICAL CYCLONE IN A COUPLE OF DAYS

cone graphic

 According to the NHC advisory number 6…

Dexter is moving toward the northeast near 12 mph, and a gradual turn toward the east-northeast is expected during the next few days. Maximum sustained winds have decreased to near 40 mph with higher gusts. Little change in strength is expected for the next day or so. Some re-strengthening is forecast in a couple of days as Dexter becomes an extratropical cyclone. Tropical-storm-force winds extend outward up to 115 miles from the center.

 

Central Tropical Atlantic

>>> A tropical wave over the far eastern tropical Atlantic is currently producing minimal shower activity. Environmental conditions are expected to be conducive for gradual development during the next few days, and a tropical depression could form by the latter portion of this week as the system moves generally west-northwestward across the central tropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…50 percent

 

Off the Southeastern United States

>>> A weak surface trough currently located several hundred miles off the coast of the southeastern United States is expected to form an area of low pressure in a day or so. Thereafter, environmental conditions appear favorable for gradual development of this system, and a tropical depression could form by the latter portion of this week or weekend as as the low initially moves slowly westward, but turns more northward by this weekend.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…medium…40 percent

 

Caribbean Sea:  There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7-days.

Gulf of America:  There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7-days.

 

Northeastern Pacific

Tropical Cyclone 08E (Henriette)…is located 940 miles west-southwest of the southern tip of Baja California

HENRIETTE STRENGTHENS SOME FAR TO THE EAST-SOUTHEAST OF HAWAII

According to the NHC advisory number 4…

Henriette is moving toward the west-northwest near 15 mph. This general motion is expected to continue during the next few days. Maximum sustained winds are near 50 mph with higher gusts. Some additional strengthening is forecast during the next day or so, followed by gradual weakening. Tropical-storm-force winds extend outward up to 80 miles from the center.

cone graphic

 

South of Southern Mexico:

>>> An area of low pressure located a couple hundred miles offshore of the coast of Central America is producing a large area of disorganized showers and thunderstorms. Environmental conditions appear conducive for development of this system, and a tropical depression is likely to form during the next couple of days while it moves west-northwestward around 15 mph.

* Formation chance through 48 hours…medium…60 percent
* Formation chance through 7 days…high…90 percent

Here’s the link to the National Hurricane Center (NHC)

 

North Central Pacific: 

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

Northwest Pacific Ocean:

Tropical Cyclone 13W (Bailu)…is located east of Misawa, Japan

https://www.metoc.navy.mil/jtwc/products/wp1325.gif

 

Tropical Cyclone 14W…is located 588 NM north-northwest of Wake Island – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp1425.gif

 

Southwest Pacific Ocean:  There are no active tropical cyclones

North and South Indian Ocean:  There are no active tropical cyclones

Arabian Sea:  There are no active tropical cyclones

Here’s a link to the Joint Typhoon Warning Center (JTWC)

 

>>> Here’s a link to the Pacific Disaster Center’s (PDC Global) Weather Wall website

 

Interesting:  Huge Hidden Flood Bursts Through the Greenland Ice Sheet Surface

A huge flood triggered by the rapid draining of a lake beneath the Greenland ice sheet occurred with such force that it fractured the ice above and burst out across its surface.

This phenomenon, observed for the first time in Greenland and detailed in research published today in the journal Nature Geoscience, sheds new light on the destructive potential of meltwater stored beneath the ice sheet.

It reveals how, under extreme conditions, water flooding underneath the ice can force its way upwards through the ice and escape at the ice sheet surface.

This phenomenon is not considered by numerical models that aim to predict the future evolution of the Greenland ice sheet, and this new work raises questions about whether this type of mechanism deserves greater attention in the future.

Read more at Lancaster University